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better shadow casting

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This commit is contained in:
Laura Klünder 2016-12-04 02:42:00 +01:00
parent 08c65d431d
commit 52d1f31c6f
2 changed files with 4 additions and 15 deletions
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16
src/c3nav/mapdata/models/level.py
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@ -1,11 +1,10 @@
from django.db import models
from django.utils.functional import cached_property
from django.utils.translation import ugettext_lazy as _
from shapely.geometry import CAP_STYLE, JOIN_STYLE
from shapely.geometry import JOIN_STYLE
from shapely.ops import cascaded_union
from c3nav.mapdata.models.base import MapItem
from c3nav.mapdata.utils import assert_multipolygon
class Level(MapItem):
@ -149,15 +148,4 @@ class LevelGeometries():
return self.get_levelconnectors()
def intermediate_shadows(self, to_level=None):
rings = []
for polygon in assert_multipolygon(self.buildings):
rings.append(polygon.exterior)
rings.extend(polygon.interiors)
objects = []
levelconnectors = self.get_levelconnectors(to_level)
for ring in rings:
objects.append(ring.difference(levelconnectors))
lines = cascaded_union(objects)
return lines.buffer(0.1, cap_style=CAP_STYLE.flat, join_style=JOIN_STYLE.mitre)
return self.buildings.difference(self.get_levelconnectors(to_level))